I am contemplating getting an A3000 or A4000 to run the BBS on. The SAM is nice, but still has issues with doorgames

I have an A1200, but I don't care for it much, I always liked the big box Amiga's better.
I am leaning towards another A3000 due to the built in scandoubler, but I'm not a big fan of SCSI anymore. What's an easy solution to add IDE to an A3000?
A4000 I always liked, but I really want to keep costs minimal and avoid having to buy anything other than a used NIC for it, so I'd need a scandoubler/flickerfixer for an A4000. A4000 IDE is a plus, though.
What's the going rate for a base model '030 A3000/A4000 with a bit of memory expansion on it - anyone got one that needs a good home going cheap in North America? I don't need anything fancy.