Install plugin wp

I have a WP site. I used the Auction Nudge AP to bring my EBay products over to the website. It works fine. However, I have tried every AP out there to get a website internal search, so that when some one comes to my website they can search the products and find what they need. I cannot get any search plugin to work. I tried Google CSE and Ajax ...etc. I need to have someone load one of the site searchable APS so it works. I don't want to pay someone and then have them tell me "Oh,we tried but it don't work" So I need someone who knows how to make it work as in the example below. EXAMPLE: I put in the search box 1986 Ford or whatever and it brings up that item(s) and I can click on it and Auction Nudge takes me to the Ebay store to complete the sale.