If your asking for an appraisal, it's kind hard .. it's a bad extension and it's a trademark, your best bet is to email paypal asking if they want to make an offer.
....Makes sense although I'd stay away from those domains... BUT if THERE WERE NO TM issuse then you'd get xxxxx$
if you are in iran i dont think they will care if paypal sue you ... but still i'm not sure if they can make something against u in iran ...
Probably you will receive a cease and desist letter. My advice: If paypal is willing to pay for your domain take the price even it's only a few dollars. Don't ask for more.
There's no way Paypal would pay for that domain. If they really wanted it, they'd take it away for free.