Photograph it. It sells itself.
Clearout prices your things from real sales, writes the listing, and puts an agent on it that talks to buyers and takes payment with PayPal.
For sale right now
Listed by Clearout from one photo each. Try haggling with their agent.

Vintage Speckled Stoneware Coffee Mugs with Brown Rim, Set of 4
$25

Vintage Bamboo and Rattan Barrel Tub Armchair with Cushion
$95

Cast Iron Skillet 10 Inch Dual Pour Spouts
$15

Vintage Mid-Century Modern Teak End Table with Slatted Shelf
$120

Textured Green Ceramic Table Lamp with Drum Shade
$65

Vintage Banker's Desk Lamp with Green Glass Shade and Brass Base
$40
01
Take one photo
Clearout works out exactly what it is and looks up what the same thing actually sold for online.
02
Set two prices
The asking price, and the lowest you'll take. Buyers only ever see the first one.
03
Your agent sells it
It answers questions, haggles within your limit, and opens a PayPal checkout when you agree on a price.
04
PayPal confirms it
The payment is confirmed by PayPal, not by a screenshot. The item is marked sold and every step is on record.