From WoWWiki

Strong Fishing Pole is one of two low level upgrades to the [Fishing Pole], and is the only one available to the Horde. Human, Dwarf, and Gnome characters who want a fishing pole with a low bonus to fishing skill may want to buy the Strong Fishing Pole rather than wait until they can get to Darkshore for the  [14] The Family and the Fishing Pole quest that awards the [Blump Family Fishing Pole].

If you want to trade up to the Strong Fishing Pole for +5 fishing skill, consider that the Fishing Pole is disposable and replaceable when your bags get full, and you can buy 20 [Shiny Bauble] lures for the same money as the Strong Fishing Pole. They grant +25 fishing skill lasting 10 minutes each, 200 minutes total, that's a lot of fishing time, plus you don't have to spend it all at once, just buy the lures as you need them. +5 fishing skill will not help much at low levels, but just one Shiny Bauble when you first start fishing in your starting zone will allow you to quickly pass the no missed catches level 30 fishing skill - or just one [Bright Baubles] in your capital city to pass the no missed catches level 75 fishing skill for the slightly harder fishing areas. In the hardest areas +5 is not nearly enough, and you are going to want a much better fishing pole anyway.

Source

This item can be purchased in limited quantity (1) for 9 2  from:

• Vernon Hale <Bait and Tackle Supplier> in Redridge Mountains
• Khara Deepwater <Fishing Supplies> in Loch Modan
• Lindea Rabonne <Tackle and Bait> in Hillsbrad Foothills
• Old Man Heming <Fisherman> in Stranglethorn Vale
• Sewa Mistrunner <Fishing Supplier> in Mulgore
• Stuart Fleming <Fisherman> in Wetlands
• Shankys <Fishing Supplies> in Durotar
• Kilxx <Fisherman> in The Barrens
• Martine Tramblay <Fishing Supplies> in Tirisfal Glades
• Zizzek <Fisherman> in The Barrens
• Voloren <Fishing Supplier> in Teldrassil
• Lizbeth Cromwell <Fishing Supplier> in Tirisfal Glades
• Tansy Puddlefizz <Fishing Supplier> in Dun Morogh
• Catherine Leland <Fishing Supplier> in Stormwind City
• Harn Longcast <Fishing Supplies> in Mulgore
• Zansoa <Fishing Supplies> in Durotar
• Savanne <Fishing Supplies> in Feralas
• Gretta Ganter <Fisherman Supplies> in Dun Morogh
• Nessa Shadowsong <Fishing Supplies> in Teldrassil
• Mai'Lahii <Fishing Supplies> in Desolace
• Wik'Tar <Fish Merchant & Supplies> in Ashenvale
• Katoom the Angler <Fishing Trainer & Supplies> in The Hinterlands
• Dekin <Fishing Supplier> in The Exodar
• Diktynna <Fishing Trainer & Supplies> in Bloodmyst Isle
• Zurjaya <Fishing Trainer> in Zangarmarsh
• Olirea <Fishing Supplier> in Silvermoon City
• Juno Dufrain <Fishing Supplies> in Zangarmarsh
• Threlc <Fishmonger> in Blade's Edge Mountains

External links

Fishing Poles
Fishing Pole • Blump Family Fishing Pole • Strong Fishing Pole • Big Iron Fishing Pole Seth's Graphite Fishing Pole • Nat Pagle's Extreme Angler FC-5000 • Arcanite Fishing Pole