How to make £200 in a couple of weeks?

Ok so i'm 13 and am really taken in by photography. I was able to save up and buy photoshop a couple of months ago and ever since that i aspire to develop photos into artwork, through the works of photoshop but i have not got a decent enough camera to do so. I have scoured the net thoroughly for ideas on how to earn money, but have not come up with any that i have been taken in by.
These are the things i have tried so please don't mention them:

- Paid to type
- Online surveys
- Paid to click
- Paid to answer questions
- iv tried 99% of 'paid to' websites
- affiliate marketing schemes
- selling (wholesale and my second hand items) on ebay
- anything that really involves wholesale marketing
- Asking for odd jobs around neighbourhood (e.g babysitting, carwashing). People are not so giving from where i live
- I have a paper round
- I have been to 'car-boot sales' to resell my items
- I have an allowance so i don't really want to ask my parents if i can do jobs for them.
- Selling cans and plastic bottles (rates where i live are incredibly low)
- Getting rid of CD's and DVD's through musicmagpie
- tried handing out leaflets
- don't really want to donate my blood/plasma just yet

^
All of the above have not worked out for me. The Digital SLR camera that i want is called the
'Nikon D3100'.It currently costs £399 and i have £250. But i will need to buy some accessories like a tripod so £200 should suffice.

Thank you and 10 points to best answer.

Added (1). I have looked at second hand/refurbished Nikon D3100 and they are around (if not the same) as they are new.

Garage sale, bake sale, panhandle, be a golf caddy, make and sell jewelry or the like, sell candy, tutor, lemonade stand, looking on the ground or in vending machines, pick up golf balls and clean them up then sell them, ask for a raise on your allowance.

Sell everything you don't need. Deliver paper, personal assistant for rich people, dog walker, file papers for a lawyer or something, errand runner, Garage sale, Hell even sell sandwiches to em (everyone like to eat). Grab a pen and paper and literally walk around asking people for more ideas. You will be surprised at what you come up with. You will never find the answer if you stop looking for it.