Shall I buy these shoes?

Well I went to TKMAXX on Tues and got some really nice roxy canvas shoes for only �5! But then I saw these green canvas converse for �19 and I was gonna get them as well but then I thought that I didnt need them cos I've got quite a lot of shoes already. But now I keep thinking of them and I really wanna go into town and get them but I cant decide! One side of me thinks yeah why not-they're cool shoes and they might sell out but then another side of me says I don't want to spend all my money because I need some new 3/4s and I dont know if I really need them. What shall I do? I really cant make my mind up!