I have been recommended the Nikon 35mm 1.8 and the nikon 50mm 1.4, which is better for gig photography. I am swaying towards the 35mm mainly because its cheaper and i dont have a lot of money. Also i have a Nikon 55-200mm f/4-5.6 DX VR Lens unused that i want to sell towards purchsing one of the above lenses, how much could i get for it and where is it best to sell it?