Switchablesusie is correct, they do indeed seem to duplicate what a lot of people already have. The site however, is a good starting point for many with less experience.
On another note. As far as vibrators go, I find the general, reasonably priced, battery operated insertables that I can use rectally, while being enjoyable in terms of insertion & physical presence, to be too harsh on my prostate which is very sensitive and distractingly irritating for me; as a result, I years ago gravitated away from their use. There are others available now that are more subtle, yet rather pricey, therefore are on the future 'to get & do' list.
An interesting link I found via the above mentioned site is the 'vibrator museum' http://www.goodvibes.com/content.jhtml?id=366 About 7 years ago, while perusing a local resale shop that is known in the community to often have no longer available home health care items such as new and in original packaging douche/enema syringes, both folding travel and hot water bottle combos along with bulb douche syringes and the occasional violet wand kit, I came upon three hand held vibrators. Two Conair and one Whal. The Conair products circa 90's have two settings that are quite satisfactory for long term arousing play.
The Whal, "Model E Home Vibrator", Wahl Clipper Corp., circa 1955, shown in the 'vibrator museum', has 1 setting, on/off/intense, when used directly non stop, climax & ejaculation for me has been measured quite often in seconds when I am fully aroused. As a result, application and use for me partnered or solo has been appropriately adjusted so as not to adversely shorten playtime. All 3 products have a rubber cup that fits on the vibrating shaft very nicely and fully embracing the top 3/4 curvature of the head of my penis, providing vibrations all the way down and into the base, all run on wall current. Suffice it to say...fun...fun...fun