So I've come to obtain a key used for Office 2013 Professional Plus on a specific schools computers [same key for all computers in the school].
All the computers use the same key and I have sold over 100 copies of Office 2013 on E-bay making a profit of over £4000 [$6300] .
Have stopped selling for over a year since my E-bay and Paypal got restricted and the keys still work fine.
So basically it is life time subscription until you go over selling a few thousands till the admins realise it.
Profit depends on how you market and sell it obviously. I sold them for £37.99 a copy [$59.70] and sold A LOT.
I sold them with the title [1 PC] so the buyers should have no clue the key works on more than 1 PC The version of Office is not "Retail" it is a "Volume" version which can be downloaded. I will give you what you need to sell it.
My previous E-bay account:
http://feedback.ebay.co.uk/ws/eBayISAPI.dll?ViewFeedback2&userid=sandniga&ftab=AllFeedback&myworld=true&rt=nc&_trksid=p2050430.m2531.l4585Will show more proof or information on request and would like to have some sort of guarantee I won't get scammed [middle man].
Willing to sell the key to one person any offers will be acknowledged.
-I've had the keys for both 2010 2013 [two different keys] for a while now and they still work