Its basically like making a Tupac / Jay-Z remix ablum. A few people may have the same verse, but if your song or track is hotter-thats what counts. Its a hit or miss in this situation, but you will have G Rap featuring on your track. I would make or get a few beats at different tempos before I would purchase. I heard about G Rap selling verses. Although, that was five years ago! You can also use his verse as a chorus, intro or maybe a remix of one of your tracks-featuring him will get a buzz.