No need for details. It's a scam. The scam involves a fake Paypal invoice & (usually) a cash wire transfer payment (by you) to a 3rd party shipper. Scammer/shipper are the same person & the Paypal invoice is fake. They try to tell you the money is 'on hold' until you arrange shipping. Paypal doesn't work like that. Anyone who asks for your Paypal address - ask for theirs so you can send them an invoice.
Got a text in response to an ad I posted on Craigslist. They basically cut and pasted the ad title and said "I hope you still get it". Spammer catcher on phone labeled it suspected spam and I got on an found this...