The available offers for Marvel Rectangular Sunglasses can vary depending on various online stores and the specific model of the Sunglasses. However, some of the common offers that are available for HP Windows laptops in India include:

1. Cashback offers: Shop via Xuper to get upto 5% Cashback
2. 2 Bank Offers: Get upto 10% instant discount offer on HDFC and ICICI etc. including no-cost EMI offers.
3. Get a limited time store discount of maximum upto 31% Off.

Buy Marvel Rectangular Sunglasses via Xuper in the following stores to get an added Cashback to your Bank A/c.

1. Tatacliq Cashback upto 4%
2. Myntra Cashback upto 4%

To earn Xuper cashback, follow these simple steps:

1. Sign up or log in to the Xuper website or app.
2. Browse the products and go to the product page you want to buy.
3. Compare the product prices across different stores with cashback.
4. Click on the "BUY NOW" button of the cashback offer to be redirected to the retailer's website or app.
5. Add the products to your cart on the retailer's website or app.
6. Apply any coupon codes for additional discounts, if available.
7. Take advantage of card offers to save more on your purchase.
8. Complete the payment process within 30 minutes of clicking out from Xuper to qualify for cashback.
9. Your cashback will reflect in your Xuper account within 72 hours.
10. Enjoy the cashback on your Xuper account, which can be transferred to your bank account in 4 to 12 weeks after purchase.

By following these steps, you can easily earn Xuper cashback while enjoying discounts and deals on your purchases.