Remember that you need to follow certain procedures (contact time, etc) for antibacterial soap or else it is no more effective than regular soap.

New toys are not generally sterile in the true sense of the word (the way medical devices are sterile), but generally other than trace materials (manufacturing residues, dust, etc) they're pretty clean. I don't worry about antibacterial but I do wash with soap and water. Keep in mind that your immune system is there for a reason and unless the toy is used or you're immune-compromised the stuff left after a soap and water wash is highly unlikely to do any harm. Remember, toilet paper isn't sterile either, nor are fingers or tongues or 95+% of rubber gloves or [...] - they're just reasonably clean.

If you do have a compromised immune system you should probably discuss toy care and use with your doctor.

Companies don't resell returned items. Every one I've seen will only resell returns if the toy came back sealed in its original packaging. Many won't accept returns of opened toys unless there's a functional issue (in which case the toy is destroyed), or if they accept general returns of used items the toy is NOT RESOLD. Not sure what they do with it - probably throw it out.

Alcohol would be safe on silicone, but if I felt the need to wipe a silicone toy down with alcohol I'd want to use something that does a better job of disinfecting than alcohol.