The only problem with 525s, or any engine, sold for upgrade is you know they were run at full or near full throttle most of their lives. Best to get a very young one.

Is that a problem??

NOPE! Not with those motors...run the 525EFI full throttle all day long

only if you go past 5350

Good price on low hours (50) 525efi 16 - 20k. 22 is not unreasonably high though. Depends on condition. Just because it has only 50 hours doesn't mean its not abused.

I'd rather have one that wasn't run at full throttle all day long.

Then obviously it will cost around the price that was already mentioned,35-40k,U can find them for around 10k and they might need 1k put into them at 500hrs...easy math

how many hours on these and are there any maint records available

and what about $$ to upgrade drives if your current drives are bravos

Did you miss the part that said "new"? What does Merc get for them new? I'm sure it has to be over $22500. I don't really know.