'97 212 Shabah for $8k in Phoenix
 

Was just browsing around and came across this ad. Looks to be a pretty low price for a 21'. Although, I can't tell from the two pics if it's a Z or not.
21' MARIAH 5.7 MERCRUISER 7950.00


These two also seemed under priced, but don't seem like quite the deal as the 21'.
1998 mariah
1997 19ft.mariah bowrider

No affiliation, blah blah blah.