When I bought my current house the previous owner didn't finish packing up until late evening. When they finally left they left all the windows open. When I got in I couldn't turn the lights on as they had cut all the light fitttings so couldn't get a good look at the state of the place.
When I went back the next day I was horrified! I found all the curtain poles had been removed by ripping them from the walls and when I turned on the kitchen tap water gushed out onto the floor from where they had temoved the washing machine without capping off the pipes.
Needless to say the carpets were in a right state and there were signs of mice. I was so upset and had to cancell the removal men who had been booked for a couple of days later.
To cap it all when I finally moved in some time later I found that there were fleas in the house (previous owner had a cat).
I had called in the estate agent to see the state of the place and wrote to the solicitor who did my conveyancing but both were useless.
As a result of all this I have never really loved my house and often begrudge doing any work on it. For example when I put in a new fireplace I've said to myself that the house doesn't deserve it. Things are beginning to change and I will soon be putting in a new kitchen and bathroom (still thinking the house doesn't deserve it!)
If I feel that way why haven't I moved? It's convenient for a lot of things, the size is good and I can't afford anywhere else without having a new, bigger mortgage and I am debt averse.
So OP you probably won't be anywhere near as bad as the awful seller of my house, but try and do a little more than the bare minimum, cleaning wise. Because as they say what goes around comes around.