Never, ever as a seller of physical goods -- especially high-value physical goods.
I've held a merchant account for more than 20 years, write PayPal integration code, and have one of their accounts too.
I'll never take it for anything of significant value -- there is literally nothing you can do if it gets charged back, and it both can and will irrespective of what PayPal tells you. If the originating funding comes from a credit card and the user charges the card back it will flow back to PayPal, be charged back to you, and if you have linked it to your bank account they can and will reach back into your BANK to get the funds. Yes you agreed to that, and if you try to get cute (by moving the money out of there before they can grab it) they'll sell the account to collections instantly which will trash your credit AND get you sued.
BTW, even if you don't get scammed there's another problem -- PayPal will 1099 you if you run material receipts through them. If you are running a business that's not a problem, since you're reporting income + expenses and paying taxes on the net profit, right? But if you're NOT running a business and this transaction is the disposal of personal properry there is frequently (depending on circumstance) no tax due (especially if there was no profit made.) Unfortunately if you get a 1099-MISC you're going to pay ordinary income rates on that payment and if you're not in business I bet you can't document your basis, which makes it zero -- and that means you pay your marginal rate (in other words the IRS could steal as much as 40% of the money!)
No, that's not a joke and if it happens you won't be laughing.