The Ten of Cups shows a situation of success, abundance and accomplishments. It also symbolizes greater awareness and experience in dealing with life's challenges. If this is the case, it indicates that there is a good chance of getting a bargain price on the shoes you saw online. There are many options to consider and you can change that so you get the best possible result.
The Star is a sign of hope and blessing. The card indicates that the universe is giving its support to your situation and that everything will be fine. So, it's not possible to change the universal support you're getting. However, that doesn't mean that further steps cannot be taken to get a cheaper price.
The Six of Cups shows a situation where something is unfolding or is coming soon. It also symbolizes joy, gratitude and reward for getting through difficult times. In your case, indicate that there may be some opportunities that you are not aware of yet, such as discounts on that particular pair of shoes you saw online.
Bottom line, chances are you can get an affordable price for the shoes you saw online. The cards show that there is a lot of potential for good discounts and deals, but you have to be prepared to shop around for all the available opportunities.