They are very reliable cars. Any maintance they require as they get into the miles is not hard. However, if the gas pump is seized (only happens if they sit stored forever), its a pain to replace.
For $2500, that could be a hell of a deal. I would need some more info though, notably milage and body condition. The 4A-GZE is a well built engine, with forged internals. I'd certainly get that pending a few things (like if it has windows

). The supercharged are hard to find cars... I haven't seen one yet myself, but I own two 87 NAs and my friends have another 3...
Takumi Fujiwara... avoid the 85-86 MR2s. Different weaker tranny (C50), with a massive issues of warped brake rotors. Also, the hand brake lever is in a much better place on the 87 ups. Additionally, the 87 up have smaller diameter steering wheels. Finally, the engine is setup differently in the 85-86 models, with a little less power (if I recall correclty)
Here is a link with a great deal of information regarding these wonderful cars... take a look at it if you are interested.
http://shell.deru.com/~sgn1/AW11/AW11.htm
For thsoe just interested in changes over the years..
http://shell.deru.com/~sgn1/AW11/Changes.htm
My personal experiance with them grows alot every day. I have two under constuction right now. Here is the link...
https://www.gtplanet.net/forum/showthread.php?t=61409
They do suffer from the legendary snap oversteer, which can be quite alarming at first. Eventually, you learn to deal with it and even enjoy it

Make for some very nice rotation in turns. The high revving of the engine is something else you must get use to. You don't have much power below 4500 RPMs, so you need to want to rev that engine. Also pay attention to the water temp and what not. They can suffer from over heating due to the piping.. but thats only if you are driving the hell outta it on a hot day pretty much...
Space wise.. yeah, its a pain in the ass. If you leave the spare tire in, you shouldn't bother with the front trunk at all really... maybe an emergency kit there. The rear trunk might fit a golf bag... and thats about it. I could stuff my coat behind the seats, and you could maybe fit a small sub mounted in a truck box. My sub is built into a custom housing in the glove box, with the amp under the passenger seat.
How do they fair in the weather? Fine. I drove my tuned one on snow with the semi slicks on it. Not the smartest idea, and I changed over to some "all season" tires shortly after the freak snow storm. The car does get sideways, yes. When this happens, you must learn not to mash the gas nor to just left off it, or even worse, mash the brakes. Quite a bit of fun once you get use to it.
I'm taking my black one out to the track this weekend, so I can give more talking on it. First race of the season, so that should be interesting.