Is this a facebook marketplace scam?

i sent her $200 $100 for the computer plus $100 for the shipping

so here it goes i'm buying a desktop computer off of a woman on facebook marketplace first time doing so i sent her $200 dollars as goods and services through paypal the woman said paypal put a hold on the funds she wants to have the $200 sent back to me by paypal and then use cash app

i said i would prefur to use paypal as it has sellers
& buyers protection

she said
Ok. But I have to come up with enough to cover shipping and float until it's received and confirmed. I will have to find someway to get that. I'm not a retailer. I'm just a chick that had an item for sell. So. I'm doing the best I can.
If you don't want to go through any other pay system I have to try to dig up money for shipping. I never dreamed this would be so hard.

is this a scam?
Updates
+1 y
i sent her the money though paypal goods and services they should have my back
Updates
+1 y
should i cancel the sale or just see what happends
Is this a facebook marketplace scam?
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