just to give you an idea, i use the ones in yellow (my mages are FAR from geared up).
the ones in red are not really good enough to sell.
the ones in green i would sell, but even those aren't like super millions
the one you have is not a terrible item, probably worth like 200k. just there is many items at that level. what people really pay for is the 1 item you find for every 10 or 20 of those. or the one item you find in every 10 or 20 of those items
you can pretty much see it in the distrubution of the picture. call the green ones A grade, there's an S grade above that. those are the 100+ mil ones. these greens probably like 5-10kk, reds like 200k. most of the greens are only a useful combo as well, not even good rolls, just the 3/1 wrestler really.
it's not that your 3/1 is worthless, just there is so many to choose from at that level that it's hard to sell. but still i think 200k it'd sell pretty easy for someone to use for a while.
see my yellows are just really greens where i've managed to use a bit of an obscure combo, or they give me exactly what i need.
to get the super high numbers it needs to have what people need as a basic, that'll be like 3 mods, then 1 or 2, useful or ideal mods.
2 ideal is like boom.
but an ideal 3 mod combo can get you into the 5mil range. 5 sdi is too meh tho, and 3/1s are not even that valuable since release of all the other casting speed items :/
you only really need em if you're using a spell chan -1. 15 magery will get you bank on a 3/1, because it's for the spell chan mage weps.
the red tier stuff i generally give away tbh.. just cos it's not worth the effort to try and sell. without other items costing rent tho, i think yours would actually sell at 200 pretty fast. but only cos it'd be cheap enough to buy and stick in a box in case you ever needed it.