I've read several not too flattering comments on here about em but I really like em and have had very good service out of em. A 25 HP4 on my Bullet/Pmax was the ticket and a 27 HP4 on my 21' Bullet/225 EFI was the ticket. Better than a Trophy if both are stock. Best performing stock prop I ran on my Bullets. JMHO!!
Your 27 HP4 is a great prop on a 21'10" Bullet with a big block.
That's where I'd be looking for a buyer.
$275-$325 depending on what kind of hurry you're in. ...again JMHO!