I finally found this at www.sco.com... at least SCO is allowing UnixWare 1.X 
users to upgrade directly, even if the price is steep:
   
UnixWare 7 Trade-in Program
A trade-in program is currently available for:
     * Existing SCO operating system customers
     * Existing SCO Development System customers
   
Existing SCO operating system customers
   A trade-in program is available for existing SCO operating system
   customers to migrate to UnixWare 7. To retain a similar configuration
   as their existing system, customers wishing to trade-in their previous
   system licenses will need to reconcile the number of users,
   multiprocessors (if more than 2 CPUs), and other optional products
   they currently have. The special pricing for the trade-in program has
   been separated into two tiers, depending upon the SCO operating system
   license and release level being traded-in. All customers must provide
   supporting proof of purchase (such as, return of Activation Key card,
   or copy of original invoice receipt) in order to qualify. The pricing
   tiers, which apply both to the UnixWare 7 Editions and the UnixWare 7
   Network User Licenses, are Current Customers and Previous Customers:
   
   Current Customer Trade-Ins: Current Customers are considered those who
   are trading-in their licenses from an SCO OpenServer 5, SCO UnixWare
   2.1, or UnixWare 2.0 system. Three Trade-In options are provided:
   
UnixWare 7 Base Edition from SCO OpenServer 5 Desktop System
     Only proof of purchase required. No additional user or processor
     license reconciliation is needed.
     
UnixWare 7 Base Edition from SCO UnixWare 2.1 or UnixWare 2.0 Personal
Edition
     This Trade-In also includes an additional processor license
     provided at no charge. Proof of purchase required. No additional
     user reconciliation is needed.
     
UnixWare 7 Departmental Edition from SCO OpenServer 5 Enterprise System, SCO
OpenServer 5 Host System, SCO UnixWare 2.1 or UnixWare 2.0 Application
Server
     This Trade-In provides a UnixWare 7 Departmental Edition already
     licensed for 5 users. Additional UnixWare 7 Trade-In Network User
     Licenses will need to be purchased to further reconcile the number
     of users. Proof of purchase required. Current Customer UnixWare 7
     Trade-In Network User Licenses are provided in 10-, 25-, 100- and
     500-user increments.
     
   Previous Customer Trade-Ins: Previous Customers are considered those
   who are trading-in their licenses from UnixWare 1.x or from SCO
   operating systems released prior to SCO OpenServer 5. Three Trade-In
   options are also provided:
   
UnixWare 7 Base Edition from Prior SCO Operating System
     Only proof of purchase required. No additional user or processor
     license reconciliation is needed. Examples would include trading-in
     from SCO Open Desktop 3.0, SCO Open Desktop Lite 3.0, or SCO UNIX
     2-User systems.
     
UnixWare 7 Base Edition from UnixWare 1.x Personal Edition
     This Trade-In also includes an additional processor license
     provided at no charge. Proof of purchase required. No additional
     user reconciliation is needed.
     
UnixWare 7 Departmental Edition from UnixWare 1.x Application Server or
Prior SCO Multiuser Operating System
     This Trade-In provides a UnixWare 7 Departmental Edition already
     licensed for 5 users. Additional UnixWare 7 Trade-In Network User
     Licenses may need to be purchased to further reconcile the number
     of users. Proof of purchase required. Examples would include
     trading-in from the SCO Open Server Network System 3.0, SCO Open
     Server Enterprise System 3.0, or SCO UNIX multiuser systems. Proof
     of purchase required. Previous Customer UnixWare 7 Trade-In Network
     User Licenses are provided in 10-, 25-, 100- and 500-user
     increments.
     
Pricing and Model Numbers
   (Suggested List Prices, U.S. dollars)
   Current Customer UnixWare 7 Trade-In
   To UnixWare 7 Base Edition (1-User) 
   From OpenServer 5 Desktop System LICPK LX420-UW00-7.0 $325
   From UnixWare 2.x Personal Edition LICPK LX420-UW10-7.0 $325
   To UnixWare 7 Departmental Edition (5-User) 
   From OpenServer 5 Host or Enterprise System LICPK LX470-UW00-7.0 $795
   From UnixWare 2.x Application Server LICPK LX470-UW00-7.0 $795
   To UnixWare 7 Network User License
   To 10-User License from Current 10 or More LICPK LX013-0010-7.0 $195
   To 25-User License from Current 25 or More LICPK LX013-0025-7.0 $475
   To 100-User License from Current 100 or More LICPK LX013-0100-7.0
   $1,850
   To 500-User License from Current 500 or More LICPK LX013-0500-7.0
   $8,995
   Previous Customer UnixWare 7 Trade-In
   To UnixWare 7 Base Edition (1-User) 
   From Previous SCO Desktop or 2-User System LICPK LX420-UW20-7.0 $395
   From UnixWare 1.x Personal Edition LICPK LX420-UW30-7.0 $395
   To UnixWare 7 Departmental Edition (5-User)
   From Previous SCO Multiuser System LICPK LX470-UW10-7.0 $995
   From UnixWare 1.x Application Server LICPK LX470-UW10-7.0 $995
   To UnixWare 7 Network User License 
   To 10-User License from Previous 10 or More LICPK LX413-0010-7.0 $250
   To 25-User License from Previous 25 or More LICPK LX413-0025-7.0 $595
   To 100-User License from Previous 100 or More LICPK LX413-0100-7.0
   $2,295
   To 500-User License from Previous 500 or More LICPK LX413-0500-7.0
   $11,250
   
Existing SCO Development System customers
   A trade-in program is available for existing SCO Development System
   customers to upgrade to the UnixWare and OpenServer Development Kit.
   All customers must provide supporting proof of purchase (such as,
   return of Activation Key card, or copy of original invoice receipt) in
   order to qualify.
   
Pricing and Model Numbers
   (Suggested List Prices, U.S. dollars)
   UnixWare and OpenServer Development Kit LICPK LA405-XX70-7.0 $595
   Trade-In from Previous Versions LICPK LU405-XX70-7.0 $250
   SCO Edition of Sun's Java Workshop LICPK LS405-JW00-2.0 $125
   SCO Edition of Sun's Java Studio LICPK LS405-JS00-1.0 $95
   UnixWare 7 Media Kit (English) CD-ROM CA400-UW74-7.0 $95
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