Babysitters

I believe a while back I might have asked this already... but I can't seem
to find it and IIRC, there wasn't too much that I had originally read (but
again, can't seem to find it)

I talked to my next door neighbour yesterday and asked her if any of her
girls babysat. She said both girls are at that age and both do babysit,
although the older one has recently taken up some kind of part time job. I
believe her daughters are16 and 12 or 13. I basically told the neighbour
that I am stuck for a sitter this weekend.
It's my dad's work Halloween party, and this is something I really do look
forward to each year, and out of the 8 he's had so far, the only one I
missed was 2 years ago, when DD2 was born. I believe she was 4 days old for
that Halloween party, so I (obviously) skipped out on the party.

Since my mom and dad will both be at this party, I'm stuck for a sitter. I
have no friends with children at the babysitting age, and I even went so far
as to ask my mom if one of my brothers might have a friend with a younger
sister and she doesn't know of any, especially one on this side of the city.
Being on my own now, I also can't drive a sitter home at the end of the
night as that would mean waking the kids up to pack them in the van to drive
a sitter home (which makes no sense to me) and this is why I asked the
neighbour.

The scenario would be I'd have all 3 in bed. They'd be fast asleep by the
time I was leaving. I figured I'd want to leave the house around 9-930pm
that night and would be back around 1am or so. There would be no need to
feed a baby, all the kids sleep through the night. No diaper changing, no
nothing, really... She'd basically just be here with the phone, TV/movies
and computer. And I've already stocked up on snacks and such. The
neighbour said she was pretty sure her daughter would be interested in
taking the job, and I asked her if she knew what her daughter charges or
would expect for 4-5 hours in the evening for 3 (sleeping) children. She
said she didn't know, and said her daughter didn't really have a set charge.
I said I was thinking about $10 an hour or so for the 3. So about $40-$50
for the evening. I'm also stuck for a sitter, and the girl next door lives
on the other side of the wall from me. When I get home I could just send
her across the fence home. She actually doesn't even need to leave my yard
to get to her yard.
I'm just wondering if $10/hour for this is too much or too little to offer
for the job. I'm going to try and catch her today, or even leave a note on
the door if all else fails. I just would like to be "fair" for both of us
with the amount paid.