Watch the seas of the gadget market for long enough, and you start to get a feel for its tides. For the last few months there seems to be a specific floor for fancy OLED gaming monitors. And while it’s certainly pricey, it’s a lot less than some of these screens are at retail. MSI is the latest supplier to surf this particular wave, and today its MEG 342C ultrawide OLED monitor is down to just $799.99 on Amazon. That’s $100 off the $1000 list price, plus an additional $100 if you click the little coupon on the sale page. The coupon brings this marvelous monitor down to the lowest price we’ve s…