[VLM]

Most marketplaces are like that including food, lumber, fasteners (screws and nails and stuff) and clothing.

Cheap junk at cheap prices, cheap junk at medium prices for the aspirational shopper, good stuff at luxury brand prices, nothing else.

If you do woodworking you can buy inconsistently zinc plated insta-rust steel for $1 online, $5 (of which $4 is pure profit) for the same junk at big box stores, or about $50 at a specialty store for stainless steel and solid (not plated) brass that looks nice and will last a lifetime.

Another example: Cell phone chargers. The one apple ships with their phones actually follows all FCC/UL specs and is legal. Dollar store charger, not so much...