Depends of you are patient. I bought only HQ items from the MB when that particular item popped up on GC turn ins and was also had a star next to it so it was double XP. So that plus double XP for HQ means you would at least gain 1 level a day.
At 20...you would gain a few.
I don't know the exact amount but I think it cost me like 100 million or so?
