Been there and done that with a few projects, though nothing that quite rises to this level.
Oh, I'm sure we've all done that. I had some experience with two pairs of Cerwin Vegas recently. The pair of U-321s came to me looking exactly like this, with "Splash" brand car subwoofers installed. After sourcing the correct woofers that needed refoaming, I tried selling the Splash subs. But even at my job, where there are young guys wanting to boom their cars out, I had no takers. I eventually just sold the CV woofers on again, put the Splash subs back in, and sold them.
These AT-12s, I bought them in a right old state. Two blown tweeters, woofers needing refoaming, the cabinets had been used in a garage or paint booth, and were covered with overspray. I contemplated doing a resto-mod job like
@lokerola did in his
VS-120 build. But the cost of two new tweeters, plus refoaming the woofers, I knew I would never get my money back, plus I have a bunch of other speaker projects. So I sold the CV woofers, put in some Fisher woofers that I saved from another pair of speakers that someone was trashing, and fitted some GRS horn tweeters that I bought from Parts Express for a buck or two.
But here's the important difference. Neither pair I sold stating that they were "upgraded", and in my Craiglist listing, I stated that the woofers (and tweeters for the AT-12s) were not the originals. They still sounded fine, and would be ideal for a garage, or outside at parties. I think I sold them both for $20 a pair.
Lee.