honestly, that is up to you to decided. I believe level 1 is if you verify a credit card or bank account. Something like that.
I have been on Listia for awhile now and you can see I have good feedback and seller wings etc...but I only have thus far verified my phone number. I just didn't want to use my facebook nor give my money info. As you get more auctions put up and more feedback, things go smoothly.
Like I said, it's up to you, but I never did anything more than my phone number and I don't plan to verify further either. =) Hope that helps.
I was wrong...sorry. This is what Listia says about level 1:
Verified Account, Level 1 When a user has provided phone verification in addition to connecting with a verified1 Facebook account, they receive this first level of verification. Phone verification means that the user has successfully given us a valid phone number they have access to.
p.s. I think it's odd they didn't give you the badge for it yet. You are more verified than me with your bank account and facebook and all....you're good. Don't worry. =)