I agree with Chris; buying components like resistors, caps, transistors from Radio Shack in any quanity is like thowing money out the car window @ 60MPH (IMHO). I avoid them in almost all cases. Having shopped Mouser, Digi-Key, Allied, Newark for electrolytics, Mouser by far has the best selection and very low cost & great shipping. My last order had a problem in that I ordered the wrong part (Molex connector) and they sent me the correct one(s) No Charge and No Shipping; and this was my fault!! IMHO you can't beat that for great customer service. A couple of other times their specs were wrong in the database and the part(s) weren't quite right; again they corrected this no charge and said just keep the incorrect ones.
Avoid the cheap %$#$% branded Chinese caps unless you love doing re-re-capping every few years. Stick with Nichicon, Rubycon, Panasonic, Illinois Capacitor, etc 105-125 deg low ESR types.
Tom (PK)