affordable cat/kitten spaying

from craigslist.org:

For other new kitten owners: please get your kitties the checkups, shots and spaying/neutering that they need. I was given the following great info:

1) MSPCA.org or call (877)590-7729. They do not ask how much you earn, and will spay a cat for $55 including rabies and distemper shots.
2) www.arlboston.org
3) thestopclinic.com who have a mobile van, and if you go to their website you can see when they will be in your town (or close by), and make an appointment.
$70 for spaying and $60 for neutering, which includes a physical and rabies shot.
4) Friendsofanimals.org on line. You can purchase a spay certificate for $65 and $51 for neutering. They send you an email instantly on the participating vets in your area, and how to get the certificate.