We do not (usually) buy exhibits.
Whilst the museum started off buying exhibits to get us going (at the personal expense of our founder), we are a charity and are lucky enough to have items donated by the public so simply don't need to purchase them. That, and to be honest, running a museum is very expensive and we don't usually have the spare funds to buy exhibits (again, we're a charity, not a business).
We only usually buy exhibits if we can't get them donated, if they are particularily hard to find, we need something to complete a collection or exhibit, or if we need an exhibit more urgently to replace an existing exhibit which has stopped working. This is rare and very much the exception, not the rule, and in this case we would usually seek to purchase it independantly.
If you really need the cash for it you might want to try listing it on ebay or asking if Retro World games shop or Mobile Games Exchange in Derby wants to buy it. Alternatively you might want to try try ebay. Of course that's up to you; it's not something we can help with.
If we're currently accepting donations, yes. Please see this page for more information.
Emails or messages asking if we'd lke to buy an exhibit will unfortunately go unanswered (sorry!). We're volunteer run and don't have the time available to respond to these, sorry!