Plug and play for 90/91 Alltracs [and obviously JDM swapped Celicas].
Will work on 92/93 if several wires are repinned at the ECU. I don't know exactly how many off the top of my head. Not that many though.

$120 shipped IN THE US.
Outside the US I need your postal code for shipping.

~25 HP bump for those of you on USDM ECUs.
Here's a thread where someone swapped in the JDM ECU and their reaction.

http://www.celicatech.com/forums/showthread.php?t=29364

hmm..interesting, i have a corolla with a 2nd gen 3sgte in it and maybe this will improve my power then. hmmm....this is tempting. i'll let you know.

i sold my old one to a buddy with a 91 usdm mr2. He also can agree with the JDM ecu creating more power. good luck with the sale.