Welcome to C and V!

I'm sure others will chime in but my observations are that it isn't an original paint job and many of the components such as brakes and rear derailleur are not correct for the bike. That doesn't mean that it is of little value, quite the opposite. It won't fetch what an original one will (check completed ebay auctions for examples) but it definitely has some substantial value.

The small chain ring on the crankset is really, uh, small. I know it isn't factory issue, but what IS it?