It's a great idea to keep a product you have already used for a while and compare its effectiveness with the new product in the same brand name. It is also a good idea to keep in mind what kind of training and the different types of workouts you should try before deciding which one to buy. Here is a great website that lists various products that will help you to make better training.
1. Avoid purchasing fitness equipment unless you're sure the equipment will be useful for your needs. It is a good idea to buy the fitness equipment based on its characteristics. The type of exercise you should do depends on your fitness level, age and fitness goals. If you plan to run and/or lift weights, you may want to consider running equipment with a resistance-based component. On the other hand, if you want to do anaerobic activities, you might want to try anaerobic equipment like treadmills.
2. Choose the most expensive fitness equipment that is also a good choice for your needs. If you don't know which equipment is right for you, find the most expensive, but also the best-performing equipment.