Renting Authorized Seasoned Tradelines

[Jake Seamons]

Hi everyone, 

Does anyone have resources or know of a good place to look for renting an authorized user privilege on a really old credit card account?  (I don't need a big credit amount, just the aged line as I recently have purchased a bunch of houses dropping my avg account age down). Before you answer please don't tell me that this can hurt my credit as I know at any given time I can be requested to be removed as that authorized user should the owner of the card default or miss a payment etc.

Thanks!