Frankly getting them from the pet store is worse than taking them from the wild. Because 1)where do you think the ones in the pet store came from? the wild 2)you are supporting the commercial collecting of them 3) more often than not they are already stressed out and on thier way out from being kept in poor conditions.
So therefore taking a few from the wild is no big deal. I at one point had a live collection of salamanders of 57 different species and 300 individuals. They can be very rewarding to keep, and Slimy's are my favorite Plethodontids to keep, they have a lot of personality and are fairly active.
Keep them in a forest floor type setup, with soil from the woods, bark, leaves, rocks, and maybe even some moss. The natural balance of organic and bacteria in the soil will help break down waste and the enclosure will pretty much maintain itself. Slimys in the wild eat mostly spiders and small insects, so tiny vitamin dusted crickets, fruit flies, pill bugs, spiders, etc. will be a good diet for them. Make sure to keep a tightly locking lid on the tank, they do climb. Mist the tank at least twice a day, and keep it in a cooler part of the house where the temp wont get over 75 degrees.
If you have any otehr questions feel free to contact me directly.
Thanks,
Dave Odd
847-409-8623