Assuming it's 100% authentic and not an NGF release, between $1500 and $2500 would be my estimate. Taking into account the price of similar releases from 1995 (SS3 US is around $1500-$2500 depending on condition) in the market, I think that's a fair estimate.
The US retro market is so volatile right now overall that it's hard to pin values to much of anything - let alone something as niche as the AES. I mean, Shawn has a US copy of RBS sitting on the Neo Store for $11k... which is almost as much as the current value on a Japanese Metal Slug.
I think that's crazy talk, but modern "collectors" are willing to pay big bucks for any US game these days. Price guides are generally worthless right now.