Since those aren't set things and you will have one snake for the time being, online is going to be expensive (shipping) for you, unless the business is close to you. Best bet is going on local snake/reptile groups on FB to see if there is any feeder rat breeders local to you. You can even go to the nearest upcoming expo and get your frozens that way. Prices will vary depending on who you buy from and what size you buy.