Trouble is, lots of folk want summat for nowt, and aren't prepared to put in the graft (ie, get in the car with spade and go and dig up stuff they want). I suppose the other thing you could do is dig them up yourself and car boot them, if you have any other stuff you want rid of, that could net you some money towards your lawned area.
I've seen adverts on freecycle where people are asking for leather recliners in a certain colour, flat-screen TV's (old CRT ones no good, actually specified on the ad), lots of folk out there get a bit fed up of want, want, want, with no stuff offered in return (I have ads where I'd like shed/chicken coop/greenhouse, but I'm prepared to travel to dismantle, and put the graft in, not a single reply - not that I blame them, these things cost lots new, so lots go on ebay.
One chap put in an advert on Freecycle wanting a porshe (not sure of spelling), very tongue in cheek, specifying colour, year, etc, and asking if it could be valeted and have a full tank of petrol before they delivered it to him. Made me laugh, as lots of very demanding posts, will really bad spelling and grammar from one particular poster the previous week.
When I've advertised, I've given the stuff to the first person that asked nicely, with reasonable spelling. If I give stuff away, I'd like it to be appreciated, and so far everyone that's picked stuff up have been nice to meet. I've had some quite rude responses - no thank you, no please could you consider me - one just asked when she could pick stuff up!!!
Maybe I should put this on the rant thread, don't like people being rude when you're trying to do them a favour!