To buy or not?

So I have hit a solid plateau. I'm trying not to be discouraged. I tell myself "this was my goal weight, if this is where I land it's a healthy weight." I still hope for more weightloss though. Just keep making healthy choices, hoping it will eventually break. One issue with this is the question of whether to buy clothes? I have generally skipped sizes, going from my 16s to purchasing 12s. I have just enough to get by. Mom and I were in TJ Maxx today trying things on and I found a great pair of black slacks, I have black slacks in 14. I've been told they are too big but I didn't want to buy more. Mom pointed out that I shouldn't count on more weightloss, these were very practical. Think if I'm at this weight for 4 more weeks,$20 would be worth it. I saw her point and took the plunge.