You would need a very decent operating budget to buy wholesale in this range, at least in a volume that would give you at least a chance of any margin on sites such as ebay, so I doubt from what you have written regarding your budget that wholesale would be a viable option.
Liquidations, yes, you do see electric acc loads at times, although they aren't what I would call very common. You will also have issues with a high percentage of that type of load being defective as it would most likely be made up from customer returns, and the surplus electrical loads usually have the highest defect rate.
Computer parts, again, you do see some parts, but mostly full units, and then you would have moq amounts around 50 units and so on.
I can't believe that I'm going to say this, but liquidation.com is the type of place you are going to find what you are looking for If you do buy from there you really do have to research the seller well, and make sure you know the shipping price, they are well known for the extreme shipping charges on lots.