I think there's none.
why do you need one? the G1 SSD has that price for a reason......
G2? Til it's fully stabilized......
I doubt Intel would (they never did this sort of thing for their motherboards, NIC's, CPU's, etc.), but try asking the retailer where you bought the SSD. Price matching and protection is typically a front-end sales thing, so it would be handled by whoever sold you the drive, not by whoever manufactured the drive.
Thanks for the question. Due to many reasons, including multiple distribution methods, Intel does not offer any price protection. Price protection would need to be worked at the point of sale. Same if you were to buy a large appliance, for example. You would look for the price protection from the store that you bought it from, not the manufacturer.
Hope that helps.