STR appraised $120,000 less than offer

[Jason Warner]

Hello friends,

I am currently under contract with my first STR in northern Michigan. The location we chose will be a 4 season rental (skiing, snowmobiling, boating, fishing, golfing) with lake/dock access. Our offer was $260,000 (which we thought was close to value) but the appraisal came back at $140,000! What do we do?? A bit of a red flag I suppose.. The previous owners have had it for only months and they paid $220,000. There are comps in the $220's but 140k is still quite far from that even!
I think I’m dealing with a management company, is there a chance they would like to off load this property before year end even at a loss to avoid paying taxes and such? 
Thanks in advance for your advice!

Jason