Or do you simply want to make as much money as you can for it without regard as to whether you help someone else solve a parts-availability problem…?
Not to answer for the OP but there is no parts availability problem with respect to guide bars. There are any number of manufacturers that make bars with the Tanaka 'pattern' for both old and new saws.
The interest would be for a person who collects or restores Vintage Saws and wanted a period correct OEM guide bar. You would be surprised the market for old saws and original parts.
Poulan has its followers, McCulloch (Mac) and others all have 'loyal to brand' followers that collect Old Saws. So a hard to find item...like a particular guide bar can be worth many times the cost of a new replacement bar and collectors are happy to pay a premium to get what they want.
They understand collecting and restoring old saws is not a charity. Actually a lot of parts 'swapping' or trading goes on between such folks.
If the OP will visit the link I provided and ask there (or other site dealing with chainsaws) he can quickly get a good idea the worth of the part and how desirable (or not) it is.