They're around $500 for a JDM, which is what you might want to get instead of a USDM. Install might run you $300, have to check around. You can get the motor from Soko or JGY but since you're in Texas you'll have to appeal to the nissan community down there for advice on where to get it installed. However if you've got a GA16de in your car now, then you'll need an SR20 Tranny, wire harness, ECU and CV axles. So add another $850 for those parts. You'll also need any parts that don't swap over from your GA16 to the SR20, like water pump, alternator, PS pump and lines if you've got PS, bout you'll have to find out what your SR20DE would come with and what will and what won't switch over. There's a few who've done the swap so do some searching here at at the SR20DEforum to find out more and who to ask about those details.