Does a coin being cheaper per unit mean it is a better deal?

No. The price of one unit tells you almost nothing on its own, because coins differ wildly in total supply. A coin priced at a fraction of a cent can have a far larger total supply than one priced higher, so per-unit price is not comparable across coins. The figure that puts price in context is market capitalisation: price multiplied by circulating supply. Even then, market cap describes current valuation, not whether something is a good purchase. This site does not give buying advice. The point is purely educational: judging value by per-unit price alone is a common error, and understanding supply is what lets you read the number correctly.