Okay, i am sure everyone is aware of google voice now days, what there not aware of is that, with a single landline or mobile phone, your able to get up to 4 different phone numbers.
I will show you:
Assuming you have your google voice account setup, navigate to your settings
Here you should uncheck where the calls are being forwarded to.
For Example, you go to Wal-Mart and buy a 7.99 prepaid phone, well ater activating it, you will receive a phone number, with this phone number you can keep setting up google voice accounts under the same number, from what i have found is, they allow about 3-4(really depends) forwarding accounts with a single phone number
So pretty much, for $7.99 you receive about 4-5 phone numbers
Honestly, eBay and PayPal tracks a lot of alternative Phone Verification Methods, such as the android apps 'TextFree' which no longer works to verify your phone number. and there cracking down on ipKall which is a virtual phone on your computer where you can recieve a VoIP phone number to have all your calls forwarded to it.
Pros: Little money spent to receive multiple phone numbers.
Cons: Spending money in general.
Hints: use your friends cell phone, Use a payphone only if you have a mobile phone next to you with internet so your able to verify the code.
This is for Research Purposes Only
The phone numbers provided in the picture is not an active phone number, just an example to show.