Hi For a 3 year old site, which has 450 recorded pages linking to it's homepage, is there a recommended limit to the amount of backlinks that should be obtained each month? Does this amount differ if the backlinks are deep linked to various pages within the site?
Getting couple of strong backlinks will be a good steps to hold its ranking position and get even higher. Think of the quality, not the quantity.
As long as you are not getting more than a few hundred a day for a few days strait it should not be a problem!