The price of an SFP (Small Form-factor Pluggable) transceiver operating at 1.25 Gbps (Gigabit per second) can vary depending on several factors, including the manufacturer, brand, type of SFP module (single-mode or multimode), and additional features such as wavelength or reach. Prices can also be influenced by market conditions, demand, and the supplier.

As of my last knowledge update in January 2023, the cost of a basic 1.25G SFP module can range from $10 to $50 or more per unit. However, please note that these are approximate price ranges, and actual prices may vary. Prices may also change over time due to market fluctuations and technological advancements.

For the most accurate and up-to-date pricing information, I recommend checking with reputable suppliers, distributors, or online retailers. Keep in mind that bulk purchasing, brand reputation, and specific features of the SFP module can also impact the overall cost. Additionally, prices may vary based on geographic location and currency fluctuations.