Haro has its own cult following like DK, etc.
Always someone out there looking for vintage Haro frames in good condition. The more original on the bike the better.
9 times out of 10 You can get a rough Haro at a pawn shop for 80-150. Clean ones go upwards of $220.
If you clean it up, air it up and throw it on offer up, you can probably get top dollar.