Not the cheapest ever but with gyms not opening anytime soon it's the best price I could find.
Enhance muscular strength & motion speed and boost metabolism to achieve greater weight loss goals. Improve cardiovascular health. Perfect for injury prevention and rehabilitation training, as it is safe and easy on the joints. Develop bone mass & motor-coordination.
A gym-in-a-bag, the PTP Total Resistance System is the ultimate set to train both upper and lower body and achieve muscular strength, body toning, fat burning and flexibility. It allows you to target arms, shoulders, chest, back, abs and legs and lets you recreate all the top workouts at home, in a park, at the beach or on travels. Choose from no less than 31 resistance combinations.
Product code 796828780
Seems expensive for some rubber bands.