Yep I'll never use ebay again for selling it's a full rip off 

I sell vinyl for 20 each and they take 8$ for each that I sell also charge 13.25 for a postage label and the post office told me me if I send it myself it's 5 bux wow 

Standard fees on a $20.00 sale  is  $2.98

How you choose to process your postage is entirely up to you, but

Minimal charge for parcel post  is   $9.70

So the figures you quote would seem to be  BS. 

There is always the possibility that you are such a good AP customer that you are entitled to significant discounts, and likewise that your ebay sales metrics mean you incur exceptional penalty fees.

Edit

Also the possibility    5BUX  converts to  $9.70AU

I actually pictured vinyl tiles - thought they were a bit expensive as I just bought some to redo cupboards - $2.55 each - Bunnings. 

Free pick up. LOLOL

Your  'post office' is most certainly telling you porkies

I am sure one of your buyers would be delighted to get a smashed record and underpaid postage notice though

Not sure how you can expect anyone here to actually believe you can really send a record in the appropriate packaging and actual real postage cost for '5 bucks' in 2023 

As for the fees, no idea why yours are so much higher than the normal fee

Good story though 

I've never heard of 'BUX' is that way before (certainly not in a currency the post office here would use)

Only 'bucks' I know is dollars and the noise a chicken makes

OP quotes $20 sales, but I don't see any for $20....so how do they quote incorrect postage and fees?