Well it definitely isn't TT food as for me Pixie always will stay as number 1 armor in game, and I'd definitely like to have a full set of SGA Pixie (M).
But to be honest I wouldn't get too excited cause it's not going to be a gold mine for you It will be worth slightly more than regular Pixie and probably only ppl like me who collect armors will be really interested to pay a lil' bit more than for regular Pixie. After all the stats are not much better than the regular Pixie's and the only thing that makes it cooler is the SGA in name