Well, there are owners and then there are owners.
Most are honest
Some are ignorant and don't realize they've neglected routine maintenance
Some are flippers.
Some are outright crooks.
If you could turn back time... and find out what MSRP was 2 years ago, which was probably 15% lower than 2019, then take 20% off that for 2 year old best deal price... my my I'd say the dealer has a very large set... I'd check ebays completed listings for a similar size and model, then IF you want an "as is" deal make a fact based offer. Or list the details about the unit here and ask members what is reasonable.
classic steps are wobblier than steel steps... if steel steps wobble one cause might be floor rot. Or just a few loose screws.
Today is a gift, that's why they call it the present.