Even though it didn't make reserve, I hope they took the money and ran with it. Seems more than fair for what it is.
Not saying it isn't a nice car, but everything about it screams "this was popular 20 years ago in custom cars". Tweed everywhere, teal pinstripes separating a metal flake color and cream, Camaro subframe, AutoMeter gauges all tell me every receipt that comes with this car is dated 1995. It doesn't appeal to everyone, but it probably used to appeal to a lot of people back in its heyday.
"Appraised value", is a term that gets thrown around a lot, and is often misunderstood. Probably the only way ths car would appraise at $48K is on replacement value, which means if it were flattened by a falling building, that's how much money it would take to get the owner a car that was as close as possible to its pre-disaster condition. It really doesn't have much bearing on what an item should sell for. I recently took my Grandmothers antique lamp into a shop to find out what it was worth, and I was given an insurance value of $1500-$1800. The next thing the lady told me was that if I tried to sell it at an antique mall, I would be lucky to get $200 for it. Supply and Demand is everything, with the emphasis on demand. Tastes and styles change over time, and with something as personal as a hot rod, you really have to be ok with the money you are putting into something for yourself, because chances are if you are not selling it right away while the trends are hot, the market is going to soften quickly. Plus, the more original parts and finish you take away, the less it is going to appeal to someone looking for an original.