Yes was always worried about how much the rental firms would sting you for when your returning the van after contract hires. Has anyone done this and not bought the van after? Also Ray did they give you decent price when you bought it off the hire firm? Also what happens of you hire a van through a ltd company and then have to close the ltd company down, who's liable for the van? Can you just hand it back?
Never hand a vehicle back with dents if you can possibly avoid it. Get a local body shop to sort it. Also, check that all the bits are there - jack, spare wheel, service record, spare key - they charge like a wounded Rhino for those things. And clean the signwriting off carefully.
Our hand-backs average between £400 and £2000 - not so many of the latter now because we have wised up. The worst thing is a little ding in each of several different body panels.
The end-of-contract prices vary. Back in 2009/10 they were dirt cheap (About £3000 for a 3yr old LWB with 60k on it) , and we bought almost everything. Since then, I think the 2nd hand Relay market must have improved, because now they are asking £5000k - £6000 for the same van.
There are a few tricks - when you phone up for a quote, never tell them that you are under or over the contract mileage. If its under, they will want it back, because you have paid for miles you haven't used. If its over, they will hike the price, because they know that if you don't buy it, you will have to pay the excess mileage fee. Always tell them that the mileage looks like it will be spot on at the end of contract.
Regarding the limited company thing, I think that the liability would rest with the company, unless you have signed a personal guarantee. But best to check that with a lawyer.