According to the GOV.UK website and the tax / MOT checker, it’s not been taxed since July last year, so it might have been sitting on a dealer’s forecourt since then, which could suggest it’s over priced or poor condition.
Any links to a dealer’s sale ad with pictures? (assuming it is for sale through a motor trader). Sometimes knowledgeable forum members can spot things from sale ads that might be good or bad.
If it’s owned privately, I’d want to understand why the owner didn’t renew the VED last year - could be for legitimate reasons - e.g. it could’ve been SORN and laid up by the owner if they weren’t using it.