I understand what you are saying but you are focusing on what BB did in the past and not the last few years,In the past few years things have been a bit different and the Bargain guys did not produce like they did in the 2001-2004 era - For example Monty Beisel,Chad Brown,Duane Starks,Earthwind Moreland and for the most part Art Hawkins were busts and signings like Otis and Vrabel and Fauria are of the past,not lately.
I just don't think the team can get good bargain basement guys easily like they used too or maybe the talent from this type of player is much rarer anymore or the oposing teams are getting smarter and grabbing these types of guys earlier than they used to leaving the team with not much to choose from but I do know it has been a failure for this team with no names since 2005 with the exception of Seau who has played decent and Welker who I cannot say enough good enough things about I absolutely love Welker more than any 2007 aquisition including Moss.
If you don't want any player with top quality skills then you had better hope for one hell of a draft to keep this team competitive in 2008 or the team is going to need to score lots of points cause the D will suffer without great changes to ILB and Corner (barring Samuel's departure)