Best way to Make mesos into NX using the MTS?

The trouble with selling at 500 nx each is that you lose most of your nx to Nexon.

 Line Graph

This is the percent of your purchase that goes to Nexon - 100% to you, 460% to Nexon at first, dropping to 100% to you, 12% to nexon at 10k NX.
That 3rd data point is a 500nx sale, more than half the profit goes to Nexon. You're basically paying Nexon 52 cents to sell a 1 dollar item.

Where exactly you think it's worth it depends how much you need, I guess, but I wouldn't sell stuff under 5k.

Well I didn't mean to imply that I thought it was the best method around, but it is indeed much cheaper than buying 10+ attack work gloves. I merely meant to give an alternative option for getting a small amount of nx for cheaper cash items. Personally, I only ever use my suggested method once every 4 to 5 months when I need to get a store permit due to my funds running thin. My method is more for people with time to waste, and I probably should have made that clear in my original post.