The cost of DS3 bandwidth can vary depending on factors such as the location, service provider, and the specific terms of the contract. Generally, DS3 lines are more expensive than T1 lines due to their higher capacity. It is advisable to contact different service providers and compare their offerings to get the best pricing for your specific needs.

Evaluating companies that provide DS3 bandwidth services can involve considering factors such as their reputation, reliability, customer support, and service level agreements (SLAs). Reading reviews and testimonials from other customers can also provide insights into the quality of their services.

Comparing services from different providers can involve looking at factors such as the maximum bandwidth offered, pricing, contract terms, additional features or services included, and any limitations or restrictions that may apply.