Socket set missing sizes

[Malique3]

Realized my socket set has some annoying gaps that keep causing problems, it's an older craftsman set I bought probably 5 years ago, 1/4 and 3/8 drive, I'm missing a couple of metric sizes I need constantly, 13mm and 17mm specifically, and I can bet the 10mm disappears into another dimension every other week. I could just buy the individual sockets I'm missing, probably spend $20 plus or maybe $30 total. Or I could upgrade to a whole new set, but good complete sets are running to even $300 and that seems like a lot when most of my current sockets still work fine.
Also, do I still stick with craftsman, or other brands to be looking at? I'm just a DIY guy working on my own stuff, not a professional mechanic, I would really appreciate suggestions

 

[mr spareparts]

I'll leave you with few words, buy two 10mm sockets, one will disappear, but you'll still have a backup

 

[bridger]

A couple of miles from my house is a used tool store. They have bins of sockets. If I need singles I go dig through the bins.

 

[Vanya]

@Malique3 maybe wait for a holiday sale to get a full replacement, but for now, buy the individual sockets you're missing, no point dropping that much