Given IKEA baby cot by my brother but my wife wanted baby cot with wheels. So, I designed and printed adaptors. Luckily, I didn't need to spend $700 for the wheels! :
Combelle Arthur, Solid Beech Wood Cot with Wheels, 70 x 140 cm - Natural unisex (bambini)
Childhome Co-sleeping Bedside Crib with Wheels, 90x50 cm, Beech Wood, White - Ideal next to the parents' bed! unisex (bambini)