Key Fob Questions

Hi guys,

I wasn't sure where to post this thread. I've read some other key fob threads on the forum, so just wanna ask some questions.

ok so i've lost my Key Fob :-( from my 2008 Seat Leon

it'll cost me about £160 to get a new one from the dealer

SO

can I buy a Seat key fob off eBay (£40) and get it CUT (price?) then Programmed to work (price?). I understand gettin it programmed 1) involves getting some type of technician to program the transponder (not sure who/how ) 2) programming it to open your car

so after those 2/3 steps I'd have a full working key?

Therefore!

Could I buy a key off eBay get it CUT to my car, then take it to the dealer and say "its just stopped working" and they'd program it for free? Does that sound viable? dishonest? good idea?

Cheers guys for the help!
Sorry if i've posted this in the completely wrong place.

P