There is virtually no difference in price between 1991-1993 prices so run it again as a 93. However, build numbers were declining so data will be working with a smaller dataset, so less accurate might be the result. But who cares, these are not Lamborghini’s.
You are asking about pricing at the worst time of year. All convertibles, boats and motorcycles are on fire sale in the fall-winter seasons because owners who are thinking of selling hate to waste so much $ on storage all winter until pricing peaks in late spring-early summer.
If your interior is really nice (rare) and it has very few dings and no rust I would guess it would draw about $1200 now, maybe $2000 in spring (installed tops cost about $300 for vinyl, $600 for cloth). Tires will factor in on cheap cars more, so their condition will also figure in predominantly.
Also, your local area will also matter. Iowa ain’t SoCal so a convertible isn’t as valuable there, and manual transmissions hurt value unless your car is a rare muscle car.
I regularly see 91-3 N/A and XR2s that appear to be in great shape for $1800 to $2000 on the low end. I used to use searchtempest.com and check them nationally. 94s are worth more, and XR2s even more but a quick check of our classified section here on this site will show even nice 94 XR2s have sold for under $4000. I just saw a pretty sharp one go on eBay for $1600, but that was unusual.
Parting it out is probably not a good idea either. Most of us buy a parts car whole and either store it or strip it. Otherwise it becomes hard to afford parts piecemeal.