IIRC, there was 2Mb limit on trapdoor expansion, but I'm not sure.
and with 2Mb Agnus, it would give you that amount of RAM..
if money is such a problem, then go for A600 with that russian 8Mb..
Then you remember INCORRECTLY.
I have an A500 Trapdoor expansion, takes 4 1MB simms.
Can be configured for 2MB of Chip (with a 2MB Agnus), and 2.5MB of Fast (Amongst other configs.)
Was made here in Australia, called "AxRam 4". I did submit it to one of the Amiga Hardware sites, but cannot find it at the moment.
[edit]
http://www.bboah.com/index.php?sid=3287&lang=en&action=artikel&cat=69&id=3175&artlang=en
