Not sure how much you were expecting to pay however better off buying the right size first time. If you think it is just big enough buy one slightly larger. As it happens we purchased an erde 163 last year with every conceivable extra fitted to it including extension sides, lockable abs hardtop roof, corner steady, shock absorbers, spare wheel, Jockey wheel & load bars to add roof box or bikes on top. It cost just over £2000 with the tailor made outdoor storage cover. I am just about to reluctantly sell it and we are in Worcester if you are interested ?
We would thoroughly recommend a lockable hard top trailer from Anssems, think its a GT500, or do a larger 750 model, get all kit in for 4 of us. tows a dream. Brought from a place in sheffield, bds trailers. Not the cheapest, cost about £1000.