"Only $299!" may work in a holiday sale when the audience already understands the product category and recognizes the price as a deal.
But when a product enters a market where $299 does not feel like a small amount, "only" can create the wrong effect.
The buyer may not think, "That's affordable." They may think, "Why are you calling this amount small?"
The issue is the assumption behind the wording: that the buyer will see the price the same way the seller does.
Localization is not translation.
It is deciding whether the product has earned the right to frame that price as low in that market.