is the risk really that great? Just had a company hit me up to put a linked article on my site for 150.00. the link they sent it my direct competition

so obviously thats a no go. i also think it may be a set up due to the nature of the contract she wanted me to sign and who the link is for


not signing shit.
but ive never dealt with buying or selling links. is it worth the risk? Our seo is killing it so i dont want to get fucked by google.