Done Help with an expression

[mote]

売られたもんはきっちり買うぜ
You buy exactly what was sold (?)

I'm not sure how to interpret this expression. It comes out of nowhere during an argument. This is the whole line:

俺を犬だと抜かしたな、吠え面かくのはそっちの方だ
I'm a dog? Sounds like you're the one who's whimpering
売られたもんはきっちり買うぜ
You buy exactly what was sold

Is it like "You reap what you sow" maybe?

 

[Utsune]

It comes from (売られた)喧嘩を買う which means 'accepting a challenge (dispute)' (lit. To buy the quarrel one sells.) So here it would be along the lines of "I'll take you on."