It seems like custom made BMW 8-Series Convertibles are twice as much as popular than we initially thought as this is the... second time in a few months that we've found such a model being offered for sale on eBay. This particular 1991 850i that has been accessorized with Alpina parts is located in California and has a 'Buy it Now' price of $32,000. If you want our opinion, with that kind of money we'd go for a pristine late 1990s example of the 8-Series -preferably a V8 model to keep running costs down- with its tin-top and its dignity, intact.