Buying a number is wasting your money. The FMCSA will not transfer the original number to the buyer, they will issue a new number, you cannot mask your history by getting an older number anymore. Just get a new one, 300.00 and the application to the FMCSA and your phone will be ringing off the hook by companies that want to do your IFTA, Prorate etc. Your application gets printed in the Federal Registar. Join OOIDA and they will do the process agents for free as part of your membership.