Let's start with the numberplate - the auction house is correct - you will need an MoT (and tax) if you want to retain the numberplates. I've no idea what condition the car is in so it's impossible to say whether getting an MoT would be prohibitively expensive or not. There's a chance having an MoT will increase its value. Selling a car at auction is fairly hassle-free - you won't have to deal with endless inquires from buyers, but the price you get will often be slightly lower than it would have been if you'd sold the car privately. Costs to watch out for include a 'listing fee' and a 'commission fee' (often a percentage of the sale price, plus VAT). Ask the auction company to provide exact details of their pricing structure. Whether or not you choose to sell your car without a reserve or not is up to you. If you don't want to, then don't. If you're happy with the guide prices they've offered, pick a reserve that is in the middle of the high and low estimates. If you're not certain about the guide values, do some market research to find out what similar models have sold for. You could also contact a few different auction houses in the same way you'd contact a few different builders for quotes for work on your house. The cars you have for sale are very desirable so make sure you get the best possible price you can.