how will appraisers look at comps in my area?

[Joe Boggin]

highly populated, dense inner city neighborhood might have 40 homes on one street or 100 homes on one square block or 800 homes in a square half of mile! on the block next to me a 3/1 sold for 11k and a 3/1 sold for 58k on the same block....a couple doors down! im sure the condition and liens or judgements might of reflected the 11k price but....

i bought a home and i plan to borrow against it in a 6-12 months. will comps like this greatly effect my appraisal? how will they navigate the value?? there are homes all over this area that sell for 10k and some that sell for close to 60k.