My pennies worth....
1. An A1200 4MB Ram Expansion simply because a lot of people just want to get the WHDLoad games to work properly and you need the ram. This could be done cheaply if surface mount technology is used instead of a simm socket. A really old 4MB card sold on ebay yesterday for £56.00! So I think that people would be prepared to pay £50 for a new one (Amigakit)
2. A 4MB PCMCIA SRAM card. I know that static ram is expensive and I know that they are not zero-wait-state but Amiga 600 users could use them as well, again, to get WHDLoad games working.
Erm, thats it. bye!