Hi all we have 3 lapsafe laptop trolleys for sale we all to fit dell laptops (we had D520's), should fit most dells hold 30 laptops each 2 work perfectly one has one bay that doesnt charge just needs a new cable which can be obtainded very cheaply These cost £2500 each when new we will be willing to take any resonable offer!! If you want to ask any questions or want photos Pmail me.