Good wood filler/putty on a budget?
 

I bought an Epi Thunderbird used from GC a couple years ago that had a broken strap button screw stuck in it and a set of straplocks. I moved the straplock button to behind the neck, so no need to worry about this being a structural thing, but I just got around to drilling out the broken screw (I'm planning on getting rid of this thing soon, and I want it to look nice). So now I have a big sort of hole where the broken screw was, one from when I moved the straplock button, plus two more from the previous owner.

I'm trying to save up my money right now, but I can spend a little on some wood filler if it means getting top dollar for this bass. Basically, as the title says, for someone with about a $10 budget, what's my best option?

Whats wrong with good ol' elmers wood filler? Always worked well for me. You could get the smallest container they sell at Home Depot for far less than $10.

Use a dowel rod. The unused putty will harden in the container. The dowel will just live somewhere in your shop until it is needed. One dowel rod will be much cheaper than wood filler.

+1 for dowel