Greeting,
Thanks for having a look at my offer,
My name Khairil. First of all, i am sure that it is not a 3-5 hours job. Lets imagine 1 items will take 1 minutes. Start from copy the URL from your website and the title of the shirt, paste it on your Pinterest account, save it. I am sure it will take roughly 1 minute/each item. So 3000 items will take me 3000 minutes = 50 hours.
I am sure i can complete it in 4 days/$200. Feel free to ask me to test the actual process to make sure how much time each item will take, i will be more than happy to do so.
Can't wait to work with you,
Khairil