SEO needed

Okay! We posted this same project before but apparently a lot of people out here cannot read. So we are going to try this again. Here is the deal. We have had ongoing SEO for several years, we are a well known company and we have about 4 or 5 competitors. Our current SEO guy who has done very well for us took a job and does not have time to do SEO any longer. We paid him $150 for on sight optimization and another $150 to get the SEO started, we did this several years back, then we simply paid him $100 per month to keep us on page #1 of Google under all our search terms. He told us that anything over $150 per month to keep us on page #1 is to much because we only have maybe 4 or 5 competitors, so your not really fighting for position against other companies. Not only that, we are already on page #1 right now for almost every search term, there are few we would like to add but right now we are on page #1 for most searches. We need somebody who can just do what is needed to keep us in this position and I can't imagine it being very difficult, it's not like we are an online sporting goods store. We are in a VERY small nitche. So we are willing to pay somebody $100 to $150 to make sure we are up where we need to be. If this goes well we will post a full time job out here. If you are not willing to take on the job for this amount of money then please DO NOT BID. We are easy to work with but we are not paying hundreds of dollars to have SEO done in such a small area. Thanks to all who took the time to read this.