Systema PTW's are also over $1,000 and there's little to no aftermarket parts for them. Apples to oranges there.
Airsplat is a retailer, not a manufacturer. Again, apples to oranges there.
What kind of warranty do you get from E1, G&G, TM, ICS, JG, etc, etc? What's involved in getting them to fix something? You mention Ares. That's one. Their program seems pretty reasonable to me.