Cash, take a close look at the swing barrels. You mentioned one was dripping already. The 555E I had showed some wear on the flange nut that holds the seals. The holes meant for a spanner wrench were buggered. If someone has been chasing a leak and damaged the nut, it could lead to a problem. Not a deal breaker, but something to look for. If I thought the previous owner had tried and failed to fix a leak there, I'd be trying to knock a grand off the price. In 2022 parts and labor prices, maybe 2k. Good luck.

@jameslavish

If you work 40 hrs/wk: at 5% inflation and after 5 years, you need a 28% pay raise or to work 44 more hours (*one full extra week* per month+) to make up the difference.

This is inflation