I usually go to outlet stores and I've found huge discounts:
-GAP: a sweater originally $45 for $5, three other shirts for $5
-H&M: two shirts for $10, flats for $4
-Banana republic: a shirt originally $18 with a discount I'll never understand, I paid $6.
My BF is very mustachian himself, we saw a Guess moto jacket that we both loved, but not his size, so I looked it up online and found it on the Macys website for a price of $198, waited a few days and ended up paying around $80, I know it's not very mustachian but we just loved it and will probably last him decades