outbuy
/ˌaʊtˈbʌɪ/verb
1 [with object] To ransom (a prisoner), to buy out of slavery; to buy out of (a state of sin) through the purchase of indulgences; to get rid of by buying. Compare to buy out.
2 [with object] To outdo in buying, buy more than. Formerly also: †to pay more for (something) than it is worth (obsolete ).
Origin
Middle English. From out- + buy.