I say good on you for getting that price for hardware that is nothing more than a collectors item. You can take a $200 PC today and make it do more than that A4000T ever could do with the best hardware upgrades ever released for them. If your wanting that look you can find near identical full AT towers free all over and slap an Amiga sticker custom made to look like the face of the A4000T printed on the best vinyl with the best color printing and still have enough to spend on a lot more other useful things.
I love Amiga as much as any of us, but the prices I see these days people pay just for the sake of having old hardware that you fight to keep working and do anything more useful than run archaic software is just beyond me.
Go out and get yourself an OS4 based machine or better yet a nice clean G5 Powermac and run the latest MorphOS.