Buying on line

I agree, however I could use an education here.

For the person who has a full time job, would like to reduce, help others out as well, and avoid mistakes.

What are the ways used to provide an accurate shipping quote on small/medium size parts?

On larger parts, hoods, fenders, etc?

Are certain parts not worth shipping? Just guessing, maybe glass isn't a good idea.

If you're selling something fragile, like a long piece of trim, is making a crate the best way?
And do you pass that cost on as part of the shipping cost?

Paypal, do you send an invoice and upcharge the buyer for the fee, or use the free friends method?

Are the things sellers forget to consider?