more economical

cost-effective efficient practical prudent

avaricious canny chary circumspect close closefisted curmudgeonly frugal meager mean methodical miserly money-saving on the rims parsimonious penny-pinching penny-wise penurious provident prudential saving scrimping skimping spare sparing stingy thrifty tight time-saving unwasteful watchful work-saving

inefficient

careless expensive uncareful uneconomical unreasonable wasteful

cheap reasonable

bought for a song cost next to nothing cost nothing cut rate dime a dozen dirt cheap dog cheap fair low low tariff low-priced marked down moderate modest on sale quite a buy reduced sound steal

expensive

careless uncareful uneconomical unreasonable wasteful