I mentioned to my neighbour that I was planning to sell my double buggy which I no longer use.
She has two small children and expressed an interest. I was surprised because she has a double buggy but I agreed she could look at it and test to see if it would fit in the boot of her car. I brought it out to her and left her to inspect it and try fitting it in to her boot.
When I looked out of the kitchen window, I noticed she'd driven off with the buggy! 
I made sure I was outside (on the pretext of putting rubbish in the bins) when I saw her return later and asked how she got on with trying out the buggy? She informed me she loved it and would like a second buggy to keep in her car but didn't have the money (I was asking for £50), could she pay me a fiver a week? I agreed.
This was three weeks ago. I've seen her once and asked if she could give me the first instalment but she said her husband hadn't been paid. Since then I think she's been avoiding me 
What would you do? I'm pathetic at confronting people.