Admin account includes 5 invites.
https://hamerd.selly.store/product/688f7d10
Price   :  200$ / BizSpark Account(MSDN Admin Account)
MSDN Offer you different benefits like free Azure VPS with $150 Credit per month till 1 year  and also on each account it's an amount of Retail keys for Microsoft Products (Windows 8.1,8,7, Office..etc...) &you will get a windows phone developer account too.

Bizspark Admin User Can Send  5 Invite to any one For MSDN Subscription.

user who receive invite can register for  MSDN Subscription For Totally Free.

Note :- You MSDN Account Will Expire After  3 Years & Don't Worry MS Retail Product Keys Never Expire  & You can easily sell these single keys to