Zoya Polish exchange program works like this:
You send at least 6 any polishes from any brand and choose any Zoya polish you like. You pay $3 for each polish half the usual price of $6. Also you have to pay shipping. Still a great deal.
I'm exchanging 10 polishes ($30) and will use Priority Flat Rate box ($4.95). So total is $ 34.95 for 10 new high quality Zoya polishes as opposed to paying at least $60.
On top of that, they'll dispose my old polishes proper way which wouldn't be harmful for the planet.
The program is till June 1st, so go to Zoya.com and get the form and instructions, PRONTO!