Should I be worried about buying a filthy unit?

[Scott Townsend]

I'm considering making an offer on a condo that I just saw. It's in a good area and seems to be recently upgraded so I'm looking at is as turnkey. But I'm getting hung up on how dirty the place is. I'm pretty sure a renter is living there, so I understand if they didn't care to tidy up, but I'm surprised the owner didn't clean before showings started. There's a layer of dirt everywhere, it reeks of smoke, and when I opened the stove (a nice, stainless steel and relatively new stove), my hand was sticky!. 

Maybe I'm making too big a deal about the filth? Should I just plan on a few hundred bucks for a deep clean once I close? Appreciate any thoughts!