Labels printed through Paypal, they should send you an email with tracking. These are USPS rates but I sometimes use UPS with larger packages.
Media Mail - 3.70 no limit on books but keep in mind there is always the risk of inspections & delays
Flat Rate Envelope - 6.60 10 comics comfortably but a bit more prone to damage
Regional Priority or UPS - 9.50 I don't charge above actual postage so you may get a partial refund.
Medium Flat Rate Box - 12.00 holds 50-60
NO SHIPPING OUTSIDE THE USA !