We didn't know the guy at all but he said he'd do it at no charge. We tipped him $50 for that. We also paid $500 or so to have him take down the remainder of the tree as well as a year or so later called him back up to take down a really large pine tree. We did not tip him for taking down the remaining 2/3 of the tree nor the pine tree. Figured he got some some good business out of his nice offer to remove the pieces free of charge. I don't have any advice on the tipping thing, but can I ask about what the cost is for cutting down the trees? I was about to post that question when I saw this post. We have 2 trees that need to come down and I need to budget the cost.
Ahh, so a tree is not just a tree. I hadn't considered that. I'll make some calls.
There was also an extra charge to take out the roots. We did it with the tree that came down but did not with the big pine tree. I wish we did as now the roots are starting to work their way to the surface and is starting to be a real pain to mow the lawn. I'll probably have to go dig them up myself this fall.

Thanks again for the info.My DH has a tree service and has sometimes gotten tips.
Sometimes people give them drinks and food too. It is a really nice gesture and so very appreciated on the hot days to have cold drinks. But they always bring whatever they need as well...so no extras are ever necessary. They bid for what they need to get and it is expensive to have trees down so extras add up even more.
As a side note, anyone needing trees completely removed always get more than one estimate to compare and make sure they are insured, and if they have employees that they have workmens comp on them. If you are getting pruning or shaping done, seek a ISA Certified Arborist to do that work, as it truly is a specialty that needs to be done right and a lot of guys that do removals aren't skilled in pruning as much and can do more damage in the long run. And topping a tree----please don't ever do that. It is so bad for trees.