I am not a good judge of price, but I found a 272xp at the dump that ended up taking about $200 in parts for bearings, gaskets, piston, air filter setup and cover. It looks like a 5 maybe, but it does run good and has good power/balance in my opinion.
Over on the Firewood Hoarders Forum, there was a discussion about a reasonable price for a 272 was somewhere between $250 and $300 for what it is worth. Here is a link to the page:
Firewood Hoarders Club Forum - Husky 272xp Value
Here is another thread on AS:
Arborist Site - Husky 272xp - How Much is it Worth? saying something similar, around $300 max.