We usuall use express for small order,sea shipping for big order,we can ship it according to clients'requirements.
We usually accept T/T,Paypal and western union.
It will be 500-1000pcs,depending on the products and your requirements.
Yes,we can help you customize your own logo on it,but there will be MOQ for it.
Most of them are 2 years'guarantee
Yes, OEM will be available, there is no problem (must be your own brand).