If I may ask, since you're trying to build a house from a door knob, how about we ask, what exactly do you need from the Collector's Edition?
A car, a weapon?
There really isn't much that they offer outside of a baseball cap and a cool map and since you're not after that I can only surmise you want a weapon or a certain car and all those both suck!
aha u my friend are an intelligent man, u see i dont want the map, blueprint, etc I only want the collector and special edition dlc pack for gta online. U see my friend has given me this hotknife but i cant store it in my garage since i dont have the right compatibility packs to do so, so its just my personal vehicle and i lose it if i want to drive any other vehicle
u posted just to say that? XD
Ah! So the goal is the Hot Knife. I didn't know you couldn't store that if you didn't have the associated download. Also, check to see what is in each one. I believe the cars are only available in one of the boxes.
I doubt anyone is going to provide the license you're looking for. People don't really appreciate, as you can probably tell, people asking for transfers. It's considered rude.
As was said, your best is going to be an online sales site of some sort or calling local stores for a left-over.
If I can suggest though, it's just not worth it in the long run unless you're just as crazy as I am and absolutely "need" to have everything. The cars that are in the set just aren't worth the effort, which is really sad. You get more from joining the Social Club website than you do paying an $ for a Collector's Edition. If you are that crazy then just find a left-over one somewhere and get it in hand instead of risking someone stiffing you for the code. I think everyone who has it would agree with me, as it's been discussed before.