It {sounds|seems|appears} like a {great|terrific|bang-up} deal: Buy this furnace, and we’ll give you an AC for free! Who doesn’t {love|enjoy|appreciate} {something that’s|things that are|something} free, right? Companies that {offer|promote|dangle} {enticing|tempting|alluring|appealing} deals like buying a furnace and getting an air conditioner for free {often|usually|can} make customers {think|believe|assume} they're going to hit the jackpot. {However|Unfortunately|But}, it's {important|essential|critical} to {approach|view|evaluate} these offers carefully. {In many cases|Many times|Often}, what {seems|looks|sounds} like a {great|very good|fantastic} deal at first may not be so {good|amazing|wonderful} in the long run.