Actually I too had bought this and felt deceived. I finally got Legacy Level 7, and I was able to buy the Repair Droid. But when I went to my ship, the items it sold was for Legacy Level 10 (or 12, whatever it is)......not 7 as advertised.
So.....yay.... I have a repair/junk vendor on my ship for now....If I knew the items it sells was a different level than what it could be purchased for, I may had just waited, but assumed once you are able to buy something, you could use it...I was/am still sick that I just blew money on that.