Ongoing program work, extensive OSCommerce experience required

Have several ongoing projects to complete on a variety of sites we own. Qualified coder will have extensive experience with OSCommerce and PHP. (Building dynamic menu, installing multi-vender format contrib, building shipping solution portal, installing OSC contribs, etc) Due to bad previous experience, those with feedback from less than 10 previous projects need not bid. Your bid should reflect your rate for 5 hours of work and will be the rate used for the rest of the work to follow. (So a bid of $50 would be equivalent to $10/hr, etc) Estimate 60-70 hours of work for an experienced coder to complete all tasks (Pay will be daily or weekly via escrow at designers option). Bonuses will apply for exceptional work, inventive solutions and quick finish.