OVERTURE PETG Filament 1.75mm, 3D Printer Consumables, 2kg Filament (4.4lbs), Dimensional Accuracy 99% Probability +/- 0.03 mm, Fit Most FDM Printer (Space Gray (2-Pack)) $18.99

2kg of Space Gray PETG filament for $18.99. You may also get a 10% coupon taking the total to $17.10.
That’s $8.55 per kg.
There are good deals, but none this crazy, on other colors as well. e.g. $30 for 2kg of black.
https://www.amazon.com/OVERTURE-F…9hdGY&th=1